Production of sodium silicate powder from waste glass cullet for alkali activation of alternative binders

被引：191
作者：
Vinai, Raffaele [1 ,2 ]
Soutsos, Marios [1 ]
机构：
[1] Queens Univ Belfast, Sch Nat & Built Environm, Belfast BT9 5AG, Antrim, North Ireland
[2] Univ Exeter, Coll Engn Math & Phys Sci, Harrison Bldg, Exeter EX4 4QF, Devon, England
来源：
CEMENT AND CONCRETE RESEARCH | 2019年 / 116卷
基金：
“创新英国”项目;
关键词：
Alkali activated cement; Glass; Fly ash; Granulated-blast furnace slag; Waste-derived activator; QUANTITATIVE-ANALYSIS; AMORPHOUS SILICA; DISSOLUTION; ASH; SPECTRA; IR; STRENGTH; KINETICS; XPS;
D O I：
10.1016/j.cemconres.2018.11.008
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
A simple process to produce sodium silicate powder from glass cullet has been developed. A mixture of glass powder, sodium hydroxide powder, and water was heated at temperatures of 150 to 330 degrees C. The effects of glass to NaOH ratio, temperature and duration, inclusion of water and fineness of NaOH were investigated. Fly ash and fly ash/GGBS blends were the precursors for alkali activated binder (AAB) mortars produced with this sodium silicate. Compressive strengths were similar to or better than those obtained with commercially available sodium silicate and sodium hydroxide solutions. FT-IR tests suggested that the reactivity of the glass derived sodium silicate powder was related to the number of non-bridging oxygen atoms in the silicate structure. Cost comparison between AAB and Portland cement concretes gave similar results for normal strength concretes (35 MPa). AAB concretes with higher strengths (50 and 70 MPa) can be cheaper than equivalent traditional concrete.
引用
收藏
页码：45 / 56
页数：12
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